Covalent-bond stabilization of the Si(111)-(3 1 -1 1)-Pb structure

C. Kumpf, M. Nielsen, R. Feidenhans'l, Y.X. Su, R.L. Johnson

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    At room temperature a monolayer coverage of Pb on Si(1 1 1) forms a hexagonal incommensurate structure which changes into a commensurate Si(1 1 1)-((3 2)(-1 1)) -Pb structure at temperatures below 230 K. A similar ((-1 1) (3 2))- reconstruction, but stable at room temperature, is formed by codeposition of Pb and Sn. Our surface X-ray diffraction measurements prove that the alloy structure is closely related to the low-temperature reconstruction. The interatomic distances reveal the nature of the chemical bonding in the surface layer and provide insight into the mechanism stabilizing the reconstruction. (C) 2001 Elsevier Science B.V. All rights reserved.
    Original languageEnglish
    JournalSurface Science
    Volume486
    Issue number3
    Pages (from-to)L495-L501
    ISSN0039-6028
    DOIs
    Publication statusPublished - 2001

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